运行Linkedin的Rest.li示例

Question

I am using the following links as a guide: 1 and 2

• I downloaded gradle 1.4 - the rest.li source requires 1.2 or higher 1 . When running gradle -version I see the following:

   Gradle 1.4 Gradle build time: Monday, January 28, 2013 3:42:46 AM UTC Groovy: 1.8.6 Ant: Apache Ant(TM) version 1.8.4 compiled on May 22 2012 Ivy: 2.2.0 JVM: 1.7.0_09 (Oracle Corporation 23.5-b02) OS: Windows 7 6.1 amd64 

  so that part should be ok.

• I downloaded all sources from 2 and unzipped them.
• I set RESTLI_HOME=/path-to-restli-source/rest.li as per 1 (not sure if I need to do this - confirmed no need).
• I navigated to <my path>\\rest.li-master\\example-standalone-app\\api in command line.

• I performed gradle build -stacktrace as per 3 . Which gives me the following stack trace:

   Creating properties on demand (aka dynamic properties) has been deprecated and is scheduled to be removed in Gradle 2.0. Please read http://gradle.org/docs/current/dsl/org.gradle.api.plugins.ExtraPropertiesExtension.html for information on the replacement for dynamic properties. Deprecated dynamic property: "pegasusVersion" on "root project 'example-standalone-app'", value: "1.8.3". Deprecated dynamic property: "spec" on "root project 'example-standalone-app'", value: "{product={pegasus={dat...". Deprecated dynamic property: "sourceCompatibility" on "project ':api'", value: "1.6". Deprecated dynamic property "sourceCompatibility" created in multiple locations. :api:generateAvroSchema UP-TO-DATE :api:mainDataModelJar UP-TO-DATE :api:generateDataTemplate There are 1 data schema input files. Using input root folder: C:\\dev\\trees\\rest.li-master\\example-standalone-app\\api\\src\\main\\pegasus :api:generateDataTemplate FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':api:generateDataTemplate'. > Ambiguous method overloading for method java.net.URLClassLoader#<init>. Cannot resolve which method to invoke for [class [Ljava.net.URL;, null] due to overlapping prototypes between: [class [Ljava.net.URL;, class java.security.AccessControlContext] [class [Ljava.net.URL;, class java.lang.ClassLoader] * Try: Run with --info or --debug option to get more log output. * Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':api:generateDataTemplate'. at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:72) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:49) at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:34) at org.gradle.api.internal.changedetection.CacheLockHandlingTaskExecuter$1.run(CacheLockHandlingTaskExecuter.java:34) at org.gradle.internal.Factories$1.create(Factories.java:22) at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:179) at org.gradle.cache.internal.DefaultCacheAccess.longRunningOperation(DefaultCacheAccess.java:232) at org.gradle.cache.internal.DefaultPersistentDirectoryStore.longRunningOperation(DefaultPersistentDirectoryStore.java:142) at org.gradle.api.internal.changedetection.DefaultTaskArtifactStateCacheAccess.longRunningOperation(DefaultTaskArtifactStateCacheAccess.java:83) at org.gradle.api.internal.changedetection.CacheLockHandlingTaskExecuter.execute(CacheLockHandlingTaskExecuter.java:32) at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:55) at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:57) at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:41) at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:51) at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:52) at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:42) at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:275) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.executeTask(DefaultTaskPlanExecutor.java:52) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.processTask(DefaultTaskPlanExecutor.java:38) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:30) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:84) at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:29) at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61) at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23) at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67) at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter$1.run(TaskCacheLockHandlingBuildExecuter.java:31) at org.gradle.internal.Factories$1.create(Factories.java:22) at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:124) at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:112) at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:134) at org.gradle.api.internal.changedetection.DefaultTaskArtifactStateCacheAccess.useCache(DefaultTaskArtifactStateCacheAccess.java:79) at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter.execute(TaskCacheLockHandlingBuildExecuter.java:29) at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61) at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23) at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67) at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32) at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61) at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:54) at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:165) at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113) at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81) at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:38) at org.gradle.launcher.exec.InProcessGradleLauncherActionExecuter.execute(InProcessGradleLauncherActionExecuter.java:39) at org.gradle.launcher.exec.InProcessGradleLauncherActionExecuter.execute(InProcessGradleLauncherActionExecuter.java:25) at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50) at org.gradle.api.internal.Actions$RunnableActionAdapter.execute(Actions.java:171) at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:201) at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:174) at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:170) at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:139) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33) at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22) at org.gradle.launcher.Main.doAction(Main.java:48) at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45) at org.gradle.launcher.Main.main(Main.java:39) at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:50) at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:32) at org.gradle.launcher.GradleMain.main(GradleMain.java:26) Caused by: groovy.lang.GroovyRuntimeException: Ambiguous method overloading for method java.net.URLClassLoader#<init>. Cannot resolve which method to invoke for [class [Ljava.net.URL;, null] due to overlapping prototypes between: [class [Ljava.net.URL;, class java.security.AccessControlContext] [class [Ljava.net.URL;, class java.lang.ClassLoader] at com.linkedin.pegasus.gradle.PegasusGeneratorV2Plugin$GenerateDataTemplate.generate(PegasusGeneratorV2Plugin.groovy:1225) at org.gradle.api.internal.BeanDynamicObject$MetaClassAdapter.invokeMethod(BeanDynamicObject.java:216) at org.gradle.api.internal.BeanDynamicObject.invokeMethod(BeanDynamicObject.java:122) at org.gradle.api.internal.CompositeDynamicObject.invokeMethod(CompositeDynamicObject.java:147) at com.linkedin.pegasus.gradle.PegasusGeneratorV2Plugin$GenerateDataTemplate_Decorated.invokeMethod(Unknown Source) at org.gradle.util.ReflectionUtil.invoke(ReflectionUtil.groovy:23) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$4.execute(AnnotationProcessingTaskFactory.java:161) at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$4.execute(AnnotationProcessingTaskFactory.java:156) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:510) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:499) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:64) ... 57 more BUILD FAILED Total time: 23.93 secs 

• The problem is with Pegasus, the schema definition generator 4 .

Answer 1

使用Java 6编译，问题是我使用的是Java 7。

Answer 2

从Pegasus 1.9.5及更高版本开始，构建版本与java 7兼容。